forked from friendica/friendica-addons
92 lines
2.7 KiB
PHP
92 lines
2.7 KiB
PHP
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<?php
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/**
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* String utility
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*
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* This class is mainly used to implement the 'text-match' filter, used by both
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* the CalDAV calendar-query REPORT, and CardDAV addressbook-query REPORT.
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* Because they both need it, it was decided to put it in Sabre_DAV instead.
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*
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* @package Sabre
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* @subpackage DAV
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* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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class Sabre_DAV_StringUtil {
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/**
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* Checks if a needle occurs in a haystack ;)
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*
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* @param string $haystack
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* @param string $needle
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* @param string $collation
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* @param string $matchType
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* @return bool
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*/
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static public function textMatch($haystack, $needle, $collation, $matchType = 'contains') {
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switch($collation) {
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case 'i;ascii-casemap' :
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// default strtolower takes locale into consideration
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// we don't want this.
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$haystack = str_replace(range('a','z'), range('A','Z'), $haystack);
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$needle = str_replace(range('a','z'), range('A','Z'), $needle);
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break;
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case 'i;octet' :
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// Do nothing
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break;
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case 'i;unicode-casemap' :
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$haystack = mb_strtoupper($haystack, 'UTF-8');
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$needle = mb_strtoupper($needle, 'UTF-8');
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break;
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default :
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throw new Sabre_DAV_Exception_BadRequest('Collation type: ' . $collation . ' is not supported');
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}
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switch($matchType) {
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case 'contains' :
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return strpos($haystack, $needle)!==false;
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case 'equals' :
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return $haystack === $needle;
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case 'starts-with' :
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return strpos($haystack, $needle)===0;
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case 'ends-with' :
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return strrpos($haystack, $needle)===strlen($haystack)-strlen($needle);
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default :
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throw new Sabre_DAV_Exception_BadRequest('Match-type: ' . $matchType . ' is not supported');
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}
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}
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/**
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* This method takes an input string, checks if it's not valid UTF-8 and
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* attempts to convert it to UTF-8 if it's not.
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*
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* Note that currently this can only convert ISO-8559-1 to UTF-8 (latin-1),
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* anything else will likely fail.
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*
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* @param string $input
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* @return string
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*/
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static public function ensureUTF8($input) {
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$encoding = mb_detect_encoding($input , array('UTF-8','ISO-8859-1'), true);
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if ($encoding === 'ISO-8859-1') {
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return utf8_encode($input);
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} else {
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return $input;
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}
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}
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}
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